Malicious PDF — malware analysis report

Static analysis result for SHA-256 733298fa464502bc…

MALICIOUS

PDF

73.5 KB Created: 2021-08-24 06:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 69907b4d0e8e15d77a4163a890454b2d SHA-1: a8657f38b782a8a91f08906fea144bbe9ae84818 SHA-256: 733298fa464502bcfacb4fe948efeeae1fb7a5b036477a37dfbbe673d71ae5ec
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8891

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072b4ce49d5f---43334662556.pdf In PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1b0b2d129---5892279188.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/kipofigamebekonaragimufen.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16091a5134524c---juwososotapidon.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16124209baa97d---doxepexoluxevelek.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608526e347ed6---vodulikiji.pdfIn PDF document text
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/34515498709.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/mutupodelafamozusuvofawi.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/paxemugotukejozarum.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/vusevolufejopope.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160f9ab824fd96---23931165007.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/2dd20361d27e6c382a15c8a0fa21ebe1/4001017548.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/82751789171.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/5vqdgohj66khvuu7osgckfq9b4/nomelezerenivugutawam.pdfIn PDF document text
    • https://galaxy-training.com/userfiles/file/1533098286.pdfIn PDF document text
    • https://hgb.se/filer/file/botonigefikusu.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160896355cf2a3---71163995745.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/vevafusasugoxeped.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-7-28/20210728082546664053.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607526237ea27---narubekazefizani.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/38256266810.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/64818681152.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/3897575240963e7a7d611beff70f77ad/zamuberudejo.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/44375775873.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=career+objective+for+electronics+engineer+fresherPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1